<template>
  <div>
    <el-tree
      :data="data"
      :show-checkbox="true"
      :default-expand-all="false"
      node-key="id"
      ref="tree"
      highlight-current
      :props="defaultProps"
      @check="getCheckedNodes"

    >

    </el-tree>
  </div>
</template>

<script>
export default {
  data() {
    return {
      data: [
        {
          id: 1,
          label: "一级 1",
          children: [
            {
              id: 4,
              label: "二级 1-1",
              children: [
                {
                  id: 9,
                  label: "三级 1-1-1",
                },
                {
                  id: 10,
                  label: "三级 1-1-2",
                },
              ],
            },
          ],
        },
        {
          id: 2,
          label: "一级 2",
          children: [
            {
              id: 5,
              label: "二级 2-1",
            },
            {
              id: 6,
              label: "二级 2-2",
            },
          ],
        },
        {
          id: 3,
          label: "一级 3",
          children: [
            {
              id: 7,
              label: "二级 3-1",
            },
            {
              id: 8,
              label: "二级 3-2",
            },
          ],
        },
      ],
      defaultProps: {
        children: "children",
        label: "label",
      },
    };
  },

  mounted() {},

  methods: {
    getCheckedNodes(data) {
        if(data.children){
            return
        }else{
            console.log(data)
        }
    },
  },
};
</script>

<style lang="less" scoped>
</style>